#include "app.hpp"
#include <fmt/xchar.h>
#include "parser.hpp"
#include "dbc.hpp"

void App::init() {
  presenter.setPosition({0,0});
  presenter.setFramerateLimit(FRAME_LIMIT);
  presenter.setVerticalSyncEnabled(VSYNC);

  slides = load_slides();
  dbc::check(slides != nullptr, "ERROR in your .md file");

  control_ui = std::make_shared<ControlUI>(presenter, controller, options.port);
  control_ui->init();
  control_ui->full_screen(false);

  reloader.watch(options.deck_file);
  reloader.watch(slides->$deck->config["layouts"]);
}

void App::change_slides() {
  // save the current slide
  auto current_slide = slides->$deck->current;
  // load the new one
  auto new_slides = load_slides();

  if(new_slides) {
    new_slides->set_slide(current_slide);
    slides = new_slides;
  }
}

void App::update() {
  if(reloader.changed()) {
    change_slides();
  }

  slides->update(presenter);
  control_ui->update(slides);
}

void App::render() {
  slides->render(presenter);
  control_ui->render(controller, *slides->$deck);

  presenter.display();
  controller.display();
}

bool App::open() {
  return controller.isOpen();
}

std::shared_ptr<SlidesUI> App::load_slides() {
  auto deck = parse_slides(options.deck_file, [&](nlohmann::json& config) {
      backend.set_font(config["font_file"]);
      guecs::init(&backend);
      });

  fmt::println("FONT FILE: {}", backend.$font_file);

  auto slides = std::make_shared<SlidesUI>(deck, options.pres_size);
  slides->init();

  return slides;
}